Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	$ 344,277,000	$ 388,670,000
Available-for-sale Securities Gross Unrealized Holding Gains	5,378,000	4,446,000
Available-for-sale Securities Gross Unrealized Holding Losses	(4,674,000)	(9,616,000)
Available-for-sale Securities Amortized Cost	343,573,000	393,840,000
US Government Agencies Debt Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	52,056,000	71,639,000
Available-for-sale Securities Gross Unrealized Holding Gains	242,000	195,000
Available-for-sale Securities Gross Unrealized Holding Losses	(623,000)	(1,702,000)
Available-for-sale Securities Amortized Cost	52,437,000	73,146,000
State and Municipal [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	79,120,000	87,199,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,587,000	1,023,000
Available-for-sale Securities Gross Unrealized Holding Losses	(395,000)	(1,627,000)
Available-for-sale Securities Amortized Cost	77,928,000	87,803,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	127,338,000	139,723,000
Available-for-sale Securities Gross Unrealized Holding Gains	2,044,000	1,436,000
Available-for-sale Securities Gross Unrealized Holding Losses	(806,000)	(2,361,000)
Available-for-sale Securities Amortized Cost	126,100,000	140,648,000
Collateralized Mortgage Obligations [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	70,656,000	75,394,000
Available-for-sale Securities Gross Unrealized Holding Gains	510,000	556,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,525,000)	(2,334,000)
Available-for-sale Securities Amortized Cost	71,671,000	77,172,000
Pooled Trust Preferred Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	2,393,000	2,069,000
Available-for-sale Securities Gross Unrealized Holding Gains	150,000	85,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,276,000)	(1,535,000)
Available-for-sale Securities Amortized Cost	3,519,000	3,519,000
Corporate Debt Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,055,000	6,021,000
Available-for-sale Securities Gross Unrealized Holding Gains	46,000	24,000
Available-for-sale Securities Gross Unrealized Holding Losses		(13,000)
Available-for-sale Securities Amortized Cost	6,009,000	6,010,000
Equity Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,659,000	6,625,000
Available-for-sale Securities Gross Unrealized Holding Gains	799,000	1,127,000
Available-for-sale Securities Gross Unrealized Holding Losses	(49,000)	(44,000)
Available-for-sale Securities Amortized Cost	$ 5,909,000	$ 5,542,000